不同喷灌定额下垄作沟播油葵根系生长及分布特征

垄作沟播喷灌技术是集垄作沟播与喷灌技术为一体的节水栽培技术.以不同灌水定额各设4个处理(灌水定额分别为24 mm、30 mm、36 mm、42 mm,灌水5次),以常规覆膜喷灌为对照(灌水定额42 mm,灌水5次).通过测定不同灌水处理下垄作沟播油葵根系生长及分布特征等指标,分析了不同灌水处理对油葵根系纵向、横向生长及...

Root Growth and Distribution Characteristics of Ridge and Furrow Planting Oil Sunflower Under Different Sprinkler Irrigation Quota

Furrow and ridge planting and sprinkler irrigation technology is an integration water-saving cultivation.In this study,four treatments were set with different irrigation quota(24 mm,30 mm,36 mm,42 mm,irrigating 5 times),and conventional film-covered sprinkler irrigation was used as the CK treatment(42 mm,irrigating 5 times).By measuring the root growth and distribution characteristics of ridge and furrow planting oil sunflower under different irrigation treatments,the longitudinal and transverse growth of oil sunflower root and the distribution of root in soil under different irrigation treatments were analyzed,and the effects on the root growth of oil sunflower were compared.The results showed that the vertical infiltration of irrigation water was deeper in ridge and furrow planting treatment,and the vertical root growth length was higher than that in the control treatment.The lateral root growth of the control treatment was concentrated in 0~20 cm underground,and the growth length was all longer than that of the ridge and furrow planting treatment,but there were fewer roots below 20 cm,and the growth length was lower than that of the ridge and furrow planting treatment.The ratio of root dry weight to total root dry weight in 0~10 cm of CK treatment was higher than that of ridge and furrow planting treatment,while that below 20 cm of ridge and furrow planting treatment was significantly higher than that of CK treatment.The distribution of root weight density in vertical soil showed a"T"shape with the growth period.The greater the irrigation amount,the greater the root weight density.With the increase of soil depth,the root weight density gradually decreased.Compared with conventional film-covered sprinkler irrigation method,furrow and ridge planting and sprinkler irrigation technology can promote the root growth of oil sunflower,increase the root dry matter,make full use of water and fertilizer resources and promote the growth of the above ground part of oil sunflower,which has a positive effect on improving the yield.So it is worth promoting gradually.